Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van thi voi snippets" » "van thi code snippets", "van tai voi snippets", "dan thi voi snippets", "van thu voi snippets", "van thi moi snippets", "van thi voc snippets", "van thi vui snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("van thi voi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van thi voi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van thi voi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van thi voi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.